Apparatus for drying woven goods.



PATENTED JAN. 31, 1905.

M. R. JAHR. APPARATUS FOR DRYING WOVEN GOODS.

APPLIOATION FILED JULY 11.1904.

2 SHEETS-SHEET 1.

PATENTED JAN. 31, 1905..

M. R. JAHR. APPARATUS FOR DRYING WOVEN GOODS.

APPLICATION FILED JULY 11,1904.

2 SHEE TS-SHEET 2.

1 UNITED STATES Patented. January 31, 1905.

, PATENT OFFICE.

APPARATUS FOR DRYING WOVEN GOODS.

SIECIFICATION forming part of Letters Patent No. 781,145, dated January31, 1905.

l Application filed July 11, 1904. Serial No- 216,068.

a full, clear, and exact specification.

Hitherto methods and apparatus for drying woven goods and the likegenerally had the disadvantage that the woven goods from the beginningto the endwere subjected to the infiuence of dry heat uniformly high,whereby the touch and smoothness of the material is very much impaired,while at the same time this dry hot air has an injurious efiect on dyedmaterial and sometimes also gives it a faded appearance. Thesedisadvantages are avoided according to the present invention, whichconsists of a method andapparatus for the drying of woven goods and thelike wherein the woven goods are led through passages lying one abovethe other and through which the dry air passes in such a manner that thegoods at their entrance into the drying-machine are at once subjected tothe action of dry air of very high temperature, which is reduced till inthe last stage it is lowered to the ordinary temperature. This iseflected by the hot air entering the channel at the bottomof thedrying-machine passing through movable flaps in certain volumes into thechannels, where its temperature is regulated by means of fresh air andbrought to the desired degree. Thevolume of fresh air which enters andregulates the heat is also adjusted by means of flaps or slides. v

The most suitable arrangement for carrying out the new method consistsin the provision of tiers of passages in the drying-machine with twofans or ventilators, one of which forces in the hot air and the otherthe fresh air. In this arrangement the hot air enters the separatepassages of the machine through flaps, which are connected together andcan be exactly arranged to admit the desired volume of air, while theconnection between the fan forcing in the fresh air and the machine ismade by means of a branch pipe whose separate branches conduct the airinto chambers, and thereby allow that the admission of the fresh air tothe passages is regulated by the same flaps and that the fresh airbefore entering into the separate passages is mixed with hot air.

The carrying out of the invention can, however, be effected in anotherway, in which an exhauster takes the place of the two fans orventilators, one exhauster being arranged within or above the upper partof the dryingmachine and exhausting the separate passages, the hot airflowing in through flaps. At the same time this exhauster causes freshair to How through slides arranged in the sides of the drying-machineinto theseparate drying-passages of the machine.

By this invention the most favorable conditions for a good drying methodhave been attained, so that the woven material can be subjected to heatat the temperature which is most suitable, according to its moisturecontained in it, and, further, as the moisture is reduced .the materialis exposed to a corresponding lower temperature, so that it does notbecome unduly dry. This prevents the material from fading and alsoprevents the textile fibers from breaking or rotting. This method wouldtherefore be used with great advantage for bleached or limed goods. Ascompared with cold-air drying-machines the new one possesses aconsiderably higher efliciency, as the drying of the material goes onmuch more quickly than in the cold-air drying-machine, while the newmachine has the further advantages that since it has means for adjustingthe temperature to correspond with the amount of moisture neither thecolor of the material nor its natural content of moisture is affected.

The new drying method also is in no way inferior to that of drying infresh air, because the temperature of the dry air in the upper passagescan be as high as 100 centigrade, while in the lowest it might only be20 centigrade or less.

The accompanying drawings serve to more clearly explain the new methodand show the necessary apparatus for carrying it into efiect.

Figure 1 shows a drying-machine in longitudinal section and showsparticularly the use of the new method with two fans. Fig. 2 shows theconnection between the pipe from the fresh-air fan and the separatedryingchannels of the drying-machine. Fig. 3 shows the arrangement inwhich the two fans are replaced by an exhausting-fan and in which theadmissionof fresh air is effected by openings regulated by slides. Fig.4 shows a transverse section of Fig. 3.

a is the drying-machine, with the channels 6 for the woven materialpassing through the machine and lying one above the other. Under themachine is arranged the heater 0, which produces the hot air. The hotair is forced in by a fan (Z, Fig. 1, to pass into the vertical channela of the machine and is admitted into the separate passages through theflaps e, which are connected together. The second fan, f, forces freshair into the machine and is connected with it by a branch pipe g, Fig.2, whose branches h lead into the separate passages, which are providedwith chambers 1?. These chambers allow the admission of the fresh air tobe regulated by the flap 0, through which the hot air enters, so thatthe fresh air is well mixed with the hot air before entering the channeland, further, allow a uniform admission of air from the beginning. Afterthe passage of the air through the machineit escapes through theexhaust-pipe in.

In the arrangement shown in Fig. 3 an exhauster Z takes the place of thetwo fans. This exhauster, which is preferably arranged in or above theupper part of the drying-Inachine, sucks into the machine air heated bythe heater and causes it to pass through the flaps e into the channelsand thence outside. In this case the admission of fresh air is alsoeffected by the exhauster. For this purpose openings 72, which can beregulated by slides m, are arranged in the wall of the drying-machine,Fig. 4.

Since all the flaps are connected together, the temperature in theseparate drying-passages can be regulated as desired, according to themoisture contained in the material.

The channel a and the inlet-flaps a can also be arranged on the oppositeside, so that the air enters into the drying-passages on this side andpasses through the drying-machine from the front to the back.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- 1. Apparatus for drying fabrics woven goods and thelike, composed of a box having a number of superposed channels adaptedfor a continuous passage of fabrics, of a heater under said box of aventilator adapted to lead;

hot air from the heater into said passages, and of means to introducecold air commingling with the hot air.

2. Apparatus for drying fabrics, woven goods, and the like, composed ofa box having anumber of superposed channels adapted for a continuouspassage of fabrics, of a heater under said box of a ventilator adaptedto lead hot air from the heater into said passages, and of a secondventilator, taking fresh air from the atmosphere, and driving it intothe said passages to commingle with the hot air and thereby regulatingits temperature.

3. Apparatus for drying fabrics, woven goods and the like, composed of abox having a number of superposed channels adapted for a continuouspassage of fabrics, of a heater under said box of a ventilator adaptedto lead hot air from the heater into said passages, and of a secondventilator taking fresh air from the atmosphere and driving it into saidpassages to commingle with the hot air and thereby regulating itstemperature, in co1nhination with adjustable flaps at the end of thepassages, said flaps being provided with means to open them more orless, so that air of a higher temperature may come in contact with thegoods upon entering the machine and that air of a lower temperature maybe in contact. with the goods when leaving the machine,

4,. Apparatus for drying fabrics, woven goods and the like com osed of abox having a number of superposed channels adapted for a continuouspassage of fabrics, of a heater under said box, of a ventilator adaptedto lead hot air from the heater into said passages, and of suitableopenings allowing cold air from the atmos hcre to enter the passages andto commingle with the hot air In testimony whereof I afiix my signature.

MORITZ RUDOLF JAHR. In presence J. STEPHAN.

SOUTHARD P. WARNER.

